/* -*- Mode: C; c-basic-offset:4 ; -*- */
/*
 *
 *  (C) 2003 by Argonne National Laboratory.
 *      See COPYRIGHT in top-level directory.
 */
#include "mpi.h"
#include <stdio.h>
#include <stdlib.h>
#include "mpitest.h"
#include <string.h>

/*
static char MTEST_Descrip[] = "Mix synchronization types";
*/

void delay( double time );
void delay( double time )
{
    double t1;
    t1 = MPI_Wtime();
    while (MPI_Wtime() - t1 < time) ;
}

int main( int argc, char *argv[] )
{
    int      errs = 0;
    int      crank, csize, source, dest, loop;
    int      *buf0, *buf1, *buf2, *inbuf2, count0, count1, count2, count, i;
    MPI_Comm comm;
    MPI_Win  win;
    int      *winbuf;

    MTest_Init( &argc, &argv );

    comm = MPI_COMM_WORLD;

    count0 = 1000;
    count1 = 1;
    count2 = 100;

    count = count0 + count1 + count2 + 2;
    
    /* Allocate and initialize the local buffers */
    buf0   = (int *)malloc( count0 * sizeof(int) );
    buf1   = (int *)malloc( count1 * sizeof(int) );
    buf2   = (int *)malloc( count2 * sizeof(int) );
    inbuf2 = (int *)malloc( count2 * sizeof(int) );
    if (!buf0 || !buf1 || !buf2 || !inbuf2) {
	fprintf( stderr, "Unable to allocated buf0-2\n" );
	MPI_Abort( MPI_COMM_WORLD, 1 );
    }
    for (i=0; i<count0; i++) buf0[i] = i;
    for (i=0; i<count1; i++) buf1[i] = i + count0;
    for (i=0; i<count2; i++) buf2[i] = i + count0 + count1;

    /* Allocate the window buffer and create the memory window. */
    MPI_Alloc_mem( count*sizeof(int), MPI_INFO_NULL, &winbuf );
    if (!winbuf) {
	fprintf( stderr, "Unable to allocate %d words\n", count );
	MPI_Abort( MPI_COMM_WORLD, 0 );
    }
    MPI_Win_create( winbuf, count*sizeof(int), sizeof(int), MPI_INFO_NULL, 
		    comm, &win );

    MPI_Comm_size( comm, &csize );
    MPI_Comm_rank( comm, &crank );
    dest   = 0;
    source = 1;

    for (loop=0; loop<2; loop++) {
	/* Perform several communication operations, mixing synchronization
	   types.  Use multiple communication to avoid the single-operation
	   optimization that may be present. */
	MTestPrintfMsg( 3, "Beginning loop %d of mixed sync put operations\n", 
			loop );	
	MPI_Barrier( comm );
	if (crank == source) {
	    MTestPrintfMsg( 3, "About to perform exclusive lock\n" );
	    MPI_Win_lock( MPI_LOCK_EXCLUSIVE, dest, 0, win );
	    MPI_Put( buf0, count0, MPI_INT, dest, 0, count0, MPI_INT, win );
	    MPI_Put( buf1, count1, MPI_INT, dest, count0, count1, MPI_INT, 
		     win );
	    MPI_Put( buf2, count2, MPI_INT, dest, count0+count1, count2, 
		     MPI_INT, win );
	    MPI_Win_unlock( dest, win );
	    MTestPrintfMsg( 3, "Released exclusive lock\n" );
	}
	else if (crank == dest) {
	    /* Just delay a bit */
	    delay( 0.0001 );
	}

	/* The synchronization mode can only be changed when the process 
	   memory and public copy are guaranteed to have the same values 
	   (See 11.7, Semantics and Correctness). This barrier ensures that 
	   the lock/unlock completes before the fence call.  */
	MPI_Barrier( comm );

	MTestPrintfMsg( 3, "About to start fence\n" );
	MPI_Win_fence( 0, win );
	if (crank == source) {
	    MPI_Put( buf0, count0, MPI_INT, dest, 1, count0, MPI_INT, win );
	    MPI_Put( buf1, count1, MPI_INT, dest, 1+count0, count1, MPI_INT, 
		     win );
	    MPI_Put( buf2, count2, MPI_INT, dest, 1+count0+count1, count2, 
		     MPI_INT, win );
	}
	MPI_Win_fence( 0, win );
	MTestPrintfMsg( 3, "Finished with fence sync\n" );

	/* Check results */
	if (crank == dest) {
	    for (i=0; i<count0+count1+count2; i++) {
		if (winbuf[1+i] != i) {
		    errs++;
		    if (errs < 10) {
			fprintf( stderr, "winbuf[%d] = %d, expected %d\n",
				 1+i, winbuf[1+i], i ); fflush(stderr);
		    }
		}
	    }
	}
	
	/* End of test loop */
    }

    /* Use mixed put and accumulate */
    for (loop=0; loop<2; loop++) {
	/* Perform several communication operations, mixing synchronization
	   types.  Use multiple communication to avoid the single-operation
	   optimization that may be present. */
	MTestPrintfMsg( 3, "Begining loop %d of mixed sync put/acc operations\n", 
			loop );	
	memset( winbuf, 0, count*sizeof(int) );
	MPI_Barrier( comm );
	if (crank == source) {
	    MPI_Win_lock( MPI_LOCK_EXCLUSIVE, dest, 0, win );
	    MPI_Accumulate( buf0, count0, MPI_INT, dest, 0, count0, MPI_INT, 
			    MPI_SUM, win );
	    MPI_Accumulate( buf1, count1, MPI_INT, dest, count0, count1, 
			    MPI_INT, MPI_SUM, win );
	    MPI_Put( buf2, count2, MPI_INT, dest, count0+count1, count2, 
		     MPI_INT, win );
	    MPI_Win_unlock( dest, win );
	}
	else if (crank == dest) {
	    /* Just delay a bit */
	    delay( 0.0001 );
	}
	/* See above - the fence should not start until the unlock completes */
	MPI_Barrier( comm );
	MPI_Win_fence( 0, win );
	if (crank == source) {
	    MPI_Accumulate( buf0, count0, MPI_INT, dest, 1, count0, MPI_INT, 
			    MPI_REPLACE, win );
	    MPI_Accumulate( buf1, count1, MPI_INT, dest, 1+count0, count1, 
			    MPI_INT, MPI_REPLACE, win );
	    MPI_Put( buf2, count2, MPI_INT, dest, 1+count0+count1, count2, 
		     MPI_INT, win );
	}
	MPI_Win_fence( 0, win );

	/* Check results */
	if (crank == dest) {
	    for (i=0; i<count0+count1+count2; i++) {
		if (winbuf[1+i] != i) {
		    errs++;
		    if (errs < 10) {
			fprintf( stderr, "winbuf[%d] = %d, expected %d\n",
				 1+i, winbuf[1+i], i ); fflush(stderr);
		    }
		}
	    }
	}
	
	/* End of test loop */
    }

    /* Use mixed accumulate and get */
    for (loop=0; loop<2; loop++) {
	/* Perform several communication operations, mixing synchronization
	   types.  Use multiple communication to avoid the single-operation
	   optimization that may be present. */
	MTestPrintfMsg( 3, "Begining loop %d of mixed sync put/get/acc operations\n", 
			loop );	
	MPI_Barrier( comm );
	if (crank == source) {
	    MPI_Win_lock( MPI_LOCK_EXCLUSIVE, dest, 0, win );
	    MPI_Accumulate( buf0, count0, MPI_INT, dest, 0, count0, MPI_INT, 
			    MPI_REPLACE, win );
	    MPI_Put( buf1, count1, MPI_INT, dest, count0, count1, MPI_INT, 
		     win );
	    MPI_Get( inbuf2, count2, MPI_INT, dest, count0+count1, count2, 
		     MPI_INT, win );
	    MPI_Win_unlock( dest, win );
	}
	else if (crank == dest) {
	    /* Just delay a bit */
	    delay( 0.0001 );
	}
	/* See above - the fence should not start until the unlock completes */
	MPI_Barrier( comm );
	MPI_Win_fence( 0, win );
	if (crank == source) {
	    MPI_Accumulate( buf0, count0, MPI_INT, dest, 1, count0, MPI_INT, 
			    MPI_REPLACE, win );
	    MPI_Put( buf1, count1, MPI_INT, dest, 1+count0, count1, MPI_INT, 
		     win );
	    MPI_Get( inbuf2, count2, MPI_INT, dest, 1+count0+count1, count2, 
		     MPI_INT, win );
	}
	MPI_Win_fence( 0, win );

	/* Check results */
	if (crank == dest) {
	    /* Do the put/accumulate parts */
	    for (i=0; i<count0+count1; i++) {
		if (winbuf[1+i] != i) {
		    errs++;
		    if (errs < 10) {
			fprintf( stderr, "winbuf[%d] = %d, expected %d\n",
				 1+i, winbuf[1+i], i ); fflush(stderr);
		    }
		}
	    }
	}
	
	/* End of test loop */
    }

    MTestPrintfMsg( 3, "Freeing the window\n" );
    MPI_Barrier( comm );
    MPI_Win_free( &win );
    MPI_Free_mem( winbuf );
    free( buf0 );
    free( buf1 );
    free( buf2 );
    free( inbuf2 );

    MTest_Finalize( errs );

    MPI_Finalize();
    return 0;
}
